The previous bugs in aboutus/secondaryNavbar.php had re-introduced themselves, so I fixed them again. Then I realized that another secondaryNavbar.php page in the studehnt subfolder has similar bugs, so I started looking at it. The left-side menu looks like it was supposed to be designed to expand and contract, so initially you would see only:

For all students
For undergraduates
For graduates

then when you clicked on one of those, it would expand and show the contents below it. But it doesn't work like that; all the contents are expanded all the time.

The code looks as though it was once written to expand and contract, but it's completely broken; it has <li> elements embedded directly inside <li> elements, multiple class attributes on the same element, and all sorts of confusion. I don't yet know how to go about fixing it, because I don't know what it originally looked like. I found an old backup of Stewart's, but it's structured completely differently; instead of secondaryNavbar.php, it uses section_left_nav.inc, which looks somewhat similar, but was only ever intended to be static. I'm waiting for some feedback from BLT, in case he can remember what the original intention was, and when the changes were made.